SIST EN ISO 14713-3:2010

SLOVENSKI STANDARD
SIST EN ISO 14713-3:2010
01-marec-2010
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SIST EN ISO 14713:1999
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Zinc coatings - Guidelines and recommendations for the protection against corrosion of
iron and steel in structures - Part 3: Sherardizing (ISO 14713-3:2009)
Zinküberzüge - Leitfäden und Empfehlungen zum Schutz von Eisen- und
Stahlkonstruktionen vor Korrosion - Teil 3: Sherardisieren (ISO 14713-3:2009)
Revêtements de zinc - Lignes directrices et recommandations pour la protection contre
la corrosion du fer et de l'acier dans les constructions - Partie 3: Shérardisation (ISO
14713-3:2009)
Ta slovenski standard je istoveten z: EN ISO 14713-3:2009
ICS:
25.220.40 Kovinske prevleke Metallic coatings
91.080.10 Kovinske konstrukcije Metal structures
SIST EN ISO 14713-3:2010 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 14713-3:2010

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SIST EN ISO 14713-3:2010


EUROPEAN STANDARD
EN ISO 14713-3

NORME EUROPÉENNE

EUROPÄISCHE NORM
December 2009
ICS 25.220.40; 91.080.10
English Version
Zinc coatings - Guidelines and recommendations for the
protection against corrosion of iron and steel in structures - Part
3: Sherardizing (ISO 14713-3:2009)
Revêtements de zinc - Lignes directrices et Zinküberzüge - Leitfäden und Empfehlungen zum Schutz
recommandations pour la protection contre la corrosion du von Eisen- und Stahlkonstruktionen vor Korrosion - Teil 3:
fer et de l'acier dans les constructions - Partie 3: Sherardisieren (ISO 14713-3:2009)
Shérardisation (ISO 14713-3:2009)
This European Standard was approved by CEN on 18 November 2009.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.






EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14713-3:2009: E
worldwide for CEN national Members.

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SIST EN ISO 14713-3:2010
EN ISO 14713-3:2009 (E)
Contents Page
Foreword .3

2

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SIST EN ISO 14713-3:2010
EN ISO 14713-3:2009 (E)
Foreword
This document (EN ISO 14713-3:2009) has been prepared by Technical Committee ISO/TC 107 "Metallic and
other inorganic coatings" in collaboration with Technical Committee CEN/TC 262 “Metallic and other inorganic
coatings”, the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by June 2010, and conflicting national standards shall be withdrawn at
the latest by June 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 14713-3:2009 has been approved by CEN as a EN ISO 14713-3:2009 without any
modification.

3

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SIST EN ISO 14713-3:2010

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SIST EN ISO 14713-3:2010

INTERNATIONAL ISO
STANDARD 14713-3
First edition
2009-12-15

Zinc coatings — Guidelines and
recommendations for the protection
against corrosion of iron and steel in
structures —
Part 3:
Sherardizing
Revêtements de zinc — Lignes directrices et recommandations pour la
protection contre la corrosion du fer et de l'acier dans les
constructions —
Partie 3: Shérardisation




Reference number
ISO 14713-3:2009(E)
©
ISO 2009

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SIST EN ISO 14713-3:2010
ISO 14713-3:2009(E)
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ii © ISO 2009 – All rights reserved

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SIST EN ISO 14713-3:2010
ISO 14713-3:2009(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 Design for sherardizing .2
4.1 General .2
4.2 Surface preparation.2
4.3 Design considerations.3
4.4 Clearances of threaded components .3
5 Storage and transport.4
5.1 General .4
5.2 Recommendations for storage and transport .4
6 Effects of article condition on quality of sherardizing .4
6.1 Composition.4
6.2 Surface condition .5
6.3 Influence of steel surface roughness on the sherardized coating thickness .5
6.4 Internal stresses in the base material .5
6.5 Large objects and thick steels .6
7 Effect of sherardizing process on the article .6
7.1 Processing circumstances.6
7.2 Coating properties influenced by the sherardizing process .7
8 After-treatments.7
Bibliography.8

© ISO 2009 – All rights reserved iii

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SIST EN ISO 14713-3:2010
ISO 14713-3:2009(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 14713-3 was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings,
Subcommittee SC 4, Hot dip coatings (galvanized, etc.).
This first edition, together with ISO 14713-1 and ISO 14713-2, cancels and replaces ISO 14713:1999, which
has been technically revised.
ISO 14713 consists of the following parts, under the general title Zinc coatings — Guidelines and
recommendations for the protection against corrosion of iron and steel in structures:
⎯ Part 1: General principles of design and corrosion resistance
⎯ Part 2: Hot dip galvanizing
⎯ Part 3: Sherardizing
iv © ISO 2009 – All rights reserved

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SIST EN ISO 14713-3:2010
ISO 14713-3:2009(E)
Introduction
Sherardizing is a thermal diffusion process in which articles are heated in the presence of a sherardizing
mixture consisting of zinc dust with or without an inert material.
The process is carried out in a slowly rotating closed container at temperatures ranging from about 300 °C to
500 °C. The normal processing temperature is below the melting point of zinc (419 °C).
During the process, zinc/iron alloys are built up on the surface of the ferrous articles. A coating thickness of
10 µm to 75 µm (and higher if required) can be achieved. The coating thickness is accurately controlled by the
amount of zinc dust, the processing time and temperature. The coating closely follows the contours of the
basis material, and uniform coatings are produced on articles, including those of irregular shape.
After sherardizing, the containers are cooled down. A screening process separates the sherardized articles
from the unused sherardizing mixture. The articles, with the zinc/iron-alloyed layer, are normally post-treated
by phosphating, chromating or another suitable passivation process (conversion coating) resulting in a dust
free and clean passivated surface.
Most steel and iron articles can be sherardized.

© ISO 2009 – All rights reserved v

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SIST EN ISO 14713-3:2010

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SIST EN ISO 14713-3:2010
INTERNATIONAL STANDARD ISO 14713-3:2009(E)

Zinc coatings — Guidelines and recommendations for the
protection against corrosion of iron and steel in structures —
Part 3:
Sherardizing
1 Scope
This part of ISO 14713 provides guidelines and recommendations regarding the general principles of design
that are appropriate for articles to be sherardized for corrosion protection.
The protection afforded by the sherardized coating to the article will depend upon the method of application of
the coating, the design of the article and the specific environment to which the article is exposed. The
sherardized article can be further protected by application of additional coatings (outside the scope of this part
of ISO 14713), such as organic coatings (wet paints or powder coatings). When applied to sherardized articles,
this combination of coatings is often known as a “duplex system”.
General guidance on this subject can be found in ISO 12944-5 and EN 13438.
The maintenance of corrosion protection in service for steel with sherardized coatings is outside the scope of
this part of ISO 14713.
Specific product-related requirements (e.g. for sherardized coatings on fasteners or tubes, etc.) will take
precedence over these general recommendations.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 8044, Corrosion of metals and alloys — Basic terms and definitions
ISO 12944-5, Paint and varnishes — Corrosion protection of steel structures by protective paint systems —
Part 5: Protective paint systems
ISO 18265, Metallic materials — Conversion of hardness values
EN 13811, Sherardizing — Zinc diffusion coatings on ferrous products — Specification
© ISO 2009 – All rights reserved 1

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SIST EN ISO 14713-3:2010
ISO 14713-3:2009(E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8044 and the following apply.
3.1
sherardizing
thermal diffusion process in which articles are heated in close contact with a sherardizing mixture, consisting
of zinc dust with or without an inert material, in a closed container, usually rotated
3.2
sherardized coating
coating consisting of zinc/iron alloys obtained by the sherardizing process, and normally post-treated by
phosphating, chromating or another suitable passivating process (conversion coating)
NOTE “Sherardized coating” is referred to in this part of ISO 14713 as “coating”.
4 Design for sherardizing
4.1 General
It is essential that the design of any article required to be finished should take into account not only the
function of the article and its method of manufacture but also the limitations imposed by the finish.
Sherardizing is a process developed to protect components of various sizes, but mainly small articles, against
corrosion and wear. No jig marks are visible after sherardizing. Normal sherardizing equipment has containers
with nominal dimensions of 2 000 mm × 480 mm × 400 mm. Specialized equipment has been developed to
treat large tubes for the gas and oil indust
...